GCP Netblock lookup tool for ipv4 and ipv6

gcp-netblock.sh

#!/bin/bash

# https://cloud.google.com/compute/docs/faq#ipranges

for LINE in `nslookup -q=txt _cloud-netblocks.googleusercontent.com 8.8.8.8 | tr " " "\n" | grep include | cut -f 2 -d :`
do
	nslookup -type=txt $LINE
done | tr " " "\n" | grep ip4 | cut -f 2 -d : | sort -n

#add v6 handling

nslookup -q=TXT _cloud-netblocks5.googleusercontent.com  8.8.8.8 | tr " " "\n" | grep ip6